Philip v



(No Model.) 2 Sheets-Sheet 1.

P. V. BAIL.

SELF CLOSING HATGHWAY.

Patented. Dec. 16, 1884.

Ates' (No Model.)

SELF CLOSING HATGHWAY.

Patented Dec. 16

Atte

N. PETERS. PluolmUlhugmphen Washmginn. o. c.

secured to the posts Unrrn rare PHILIP V. BAIL, OF GOW'DEN, ILLINOIS,ASSIGNOR OF ONE-FOURTH IO IVILLIAM H. BAIL AND ANDBEIV S. BAIL, OF SAMEPLACE.

SELF CLOSING HATCHWAY;

SPECIFICATION forming part of Letters Patent No. 309,330, datedDecemberl6,1884.

Application filed September 13, 1884. (No model.)

To all whom it may concern:

Be it known that I, PHILIP V. BAIL, of

Cowden, in the county of Shelby and State of Illinois, have invented acertain new and useful Improvement in Self-Closing Hatchways, of whichthe following is a full, clear, and exact description, reference beinghad to the accompanying drawings, forming part of this specification,and in which- Figure l is a vertical section taken on line 1 1, Fig. 2.Fig. 2 is a top view. Fig. 3 is a side elevation of the operatingmechanism, belnga section of the floor, taken on line 3 3, Fig. 2. Figs.4. and 5 are transverse sections taken on lined 5, Fig. 1, the doorsbeing closed in Fig. 4 and the cage not shown, and in Fig. 5 the doorsbeing open and the cage between them. Fig. 6 is a top View showing amodified form of the arrangement of the rope or cable for operating thecams. Fig. 7 isa section taken on line 7 7, Fig. 2.

My invention relates to those automatic selfclosing hatchways whosedoors are connected to levers which areelevated by means of cams mountedon shafts connected with the hoisting apparatus; and my inventionconsists in features of novelty hereinafter fully described, and pointedout in the claims.

Referring to the drawings, A represents the cage, B the uprights, and GO the doors, of an elevator.

D D represent ropes or cables connecting the doors 0 G with the freeends of levers I I, hinged on a rod or shaft, J, supported by bracketsJ. secured to posts J 2 or to other suitable obj ects. I have shown twocables and two lovers for each door; but a single cable and lever coulddo the work. The cables may pass through staples L, secured to theuprights. Beneath each lever, on a shaft, N, is an eccentric cam, N. Theshaft is journaled in boxes N The levers bear against the cams and arepreferably provided with friction-rollers I (See Fig. 1.) On the shaft Nis a large pulley, O, which is connected by means of a rope orbelt, O,to a small pulley, 0 on a shaft, 0', to which the main cable-pulley I issecured; or the rope or belt may pass around and be secured to the shaftitself, and

the pulley 0 be dispensed with. The shaft is journaled in boxes 0*,secured to cross-pieces 0 made fast to the uprights B and two of theposts J (See-Fig. 2.)

y 1? represents the main hoisting-cable, passing over the pulley P. Itwill thus be seen that as the cage ascends and descends the shaft N andcams thereon will be turned through means of its connection with theshaft 0, which is turned by the hoistingcable. The levers hold the doorsin their closed position until the narrow parts of the cams comeopposite the levers, when they drop, allowing the doors connected tothat set of levers to fall open, as shown in the upper part of Fig. 1.The parts are so adjusted that the doors of each floor will be openedjust before the cage reaches them, and will be closed as soon as thecage passes. The pulley 0 should be enough larger than that 0 so thatthe cams would have but one revolution during the entire travel of thecage in either direction; otherwise the doors would be opened more thanonce, which would be objectionable. The cams and levers are located atthe top of the building, and there would be as many pairs of them asthere are doors, of

which there is a pair for each floor. The doors may have weights 0*, toopen them quickly when the depressed parts of the cams come opposite thelevers, as stated. WVhen the hoisting-cable pulley P is at the side ofthe elevator-shaft at right angles to the levers, the belt 0 would passover or through an idler-pulley, 0 (See Fig. 6.) The mechanism foropening the doors and closing them thus being entirely at the top of thebuilding, the noise through the building so common to thesehatch-closers is avoided.

I claim as my invention 1. The combination of brackets J, secured tosuitable supports, rod J supported in the brackets, eccentric cam N,camshaft N beneath the brackets, lever I, hinged to the rod andsupported on the cam, drop-doors 0, cables D D, connecting drop-doors toouter end of lever, large pulley O 011 the shaft, hoistingcable shaft Orope 0, connecting large pulley hoisting-cable P, as set forth.

2. I In a self-closing hatchway, the comblna- 0, connecting the pulleyto a pulley on the tion of the platform or cage A, doors 0 O,hoisting-cable shaft, and weight .0 secured 1o hinged levers I 1, cablesor ropes D D, conto the doors, all sribstantially as set forth. nectingthe levers to the doors to close or 5 drop the latter, guide-staples L,through PHILIP BAIL which the cables pass, cams N, cam-shaft N, Inpresence offrictlon-rollers I on the levers bearing against WM. H. BAIL,the cams, large pulley O on the cam-shaft, belt CHARLES B. EVANS.

